JP6504523B2 - Antistatic structure, method for producing the same, and antistatic antifouling structure - Google Patents

Description

  The present invention relates to an antistatic structure, a method for producing the same, and an antistatic antifouling structure. More particularly, the present invention relates to an antistatic structure having excellent antistatic properties, a method for producing the antistatic structure, and an antistatic antifouling structure to which the antistatic structure is applied.

  In the past, articles having slippery surfaces capable of repelling foreign substances have been proposed. The article is an article having a water repellent surface, a substrate having a rough surface, and a lubricating liquid that wets and adheres to the rough surface to form a stabilized liquid coating layer, wherein the liquid is greater than the rough surface. And a lubricating liquid covering the rough surface with a thickness sufficient to form a liquid upper surface on the upper side. And, the rough surface and the lubricating fluid have an affinity for each other so that the lubricating fluid is substantially immobilized on the substrate to form a water repellent surface. It is also described that the article is capable of repelling foreign matter, that the rough surface is provided with a chemically functionalized layer, and that the rough surface has a roughness coefficient greater than 1 (Patent Document 1) 1)).

Japanese Patent Application Publication No. 2014-509959

  However, in the article described in Patent Document 1, there is a problem that fluorine oil is easily charged, and solid dirt such as dust and sand is easily attached by static electricity.

  The present invention has been made in view of the problems of the prior art. The present invention also provides an antistatic structure having excellent antistatic properties, an antistatic antifouling structure to which the same is applied, an automobile component to which the same is applied, and a method of manufacturing the antistatic structure. Do.

  The present inventors diligently studied to achieve the above object. As a result, by providing a surface layer formed by at least one of the fine concavo-convex structure and the fine porous structure, the surface layer having a conductive layer containing conductive needle-like particles, etc. It is found that the present invention can be achieved.

That is, antistatic structure of the present invention comprises a surface layer formed by at least one of fine uneven structure and the fine porous structure, the surface layer, have a conductive layer containing conductive acicular particles The conductive needle-like particles have a formula (2): 10 ≦ B [nm] / A [nm] ≦ 100 (2) and a formula (3): A [nm] <380 [nm] / n ₁ (3) (in the formula (2) and the formula (3), A is the minor diameter of the conductive needle particles, B is the major diameter of the conductive needle particles, n ₁ is the refractive index of the conductive needle particles (4): 10 [nm] ≦ D [nm] ≦ 400 [nm] / n ₂ (4) (Equation 4 In the above, D is the average diameter of the surface opening of the microporous structure, and n ₂ is the refractive index of the component of the surface layer (excluding the conductive needle-like particles). Add

  The antistatic antifouling structure of the present invention comprises the above antistatic structure of the present invention and a fluorine-containing liquid impregnated in the surface layer thereof.

  Furthermore, the method for producing an antistatic structure according to the present invention comprises a surface layer formed by at least one of a microrelief structure and a microporous structure, and the surface layer contains a conductive needle-like particle. A method of producing an antistatic structure having the following steps (1) to (3).

Step (1): A raw material of a component of the surface layer (however, except the surface treatment agent) and a dispersion for dispersing the raw material, the specific gravity (G ₁ ) of the conductive needle particles, and the raw material The coating layer is coated on the substrate by a coating liquid having a specific gravity difference (G ₁ -G ₂ ) with respect to the specific gravity (G ₂ ) of the solution other than the conductive needle particles and the dispersion among them. Form.
Step (2): The coating layer, which is carried out after step (1), is heated to remove the dispersion medium in the coating layer.
Step (3): The coating layer is heated, which is carried out after step (2), and the materials in the coating layer are reacted to form a surface layer.

According to the present invention comprises a surface layer more is formed on the microporous fine porous structure, the surface layer, have a conductive layer containing conductive acicular particles, conductive acicular particles, wherein (2 ): 10 ≦ B [nm] / A [nm] ≦ 100 (2) and formula (3): A [nm] <380 [nm] / n ₁ (3) (formula (2)) In the formula (3), A represents the minor diameter of the conductive needle particles, B represents the major diameter of the conductive needle particles, and n ₁ represents the refractive index of the conductive needle particles. The microporous structure is represented by the formula (4): 10 [nm] ≦ D [nm] ≦ 400 [nm] / n ₂ (4) (in the formula (4), D is the number of the microporous structure the average diameter of the surface openings, n ₂ is the surface layer constituting material (excluding the conductive acicular particles.) was such satisfied constituting the relationship shown in shown.) the refractive index of. Therefore, an antistatic structure having excellent antistatic properties, a method for producing the antistatic structure, and an antistatic antifouling structure to which the antistatic structure is applied can be provided.

FIG. 1 (A) is a schematic cross-sectional view showing an antistatic structure according to a first embodiment of the present invention, and FIG. 1 (B) is an antistatic structure shown in FIG. 1 (A). It is explanatory drawing which shows arrangement | positioning of the electroconductive needle-like particle | grain in the conductive layer seen from the upper surface side. FIG. 2 is a flow chart showing a method of manufacturing an antistatic structure according to a second embodiment of the present invention. FIG. 3 is a schematic cross-sectional view showing an antistatic antifouling structure according to a third embodiment of the present invention.

  Hereinafter, an antistatic structure, a method for manufacturing the antistatic structure, and an antistatic antifouling structure to which the antistatic structure is applied according to an embodiment of the present invention will be described in detail.

First Embodiment
First, an antistatic structure according to a first embodiment of the present invention will be described in detail with reference to the drawings. The dimensional ratios in the drawings referred to in the following embodiments are exaggerated for the convenience of description, and may differ from the actual ratios. FIG. 1 (A) is a schematic cross-sectional view showing an antistatic structure according to a first embodiment of the present invention, and FIG. 1 (B) is the antistatic shown in FIG. 1 (A). It is explanatory drawing which shows arrangement | positioning of the electroconductive needle-like particle | grain in the conductive layer seen from the upper surface side of a structure. In addition, in FIG. 1 (B), the description of the constituent material of surface layers other than the electroconductive needle-like particle | grains contained in the electroconductive layer depending on the case is abbreviate | omitted.

  As shown in FIG. 1, the antistatic structure 10 of the present embodiment is provided with a surface layer 11 formed of at least one of a fine uneven structure and a fine porous structure on a base material 13, and a surface layer 11. The conductive layer 12 includes the conductive needle-like particles 12A in a dispersed state. Further, in the present embodiment, the conductive layer 12 is disposed in the lowermost layer of the surface layer 11. In addition, the code | symbol 11A in FIG. 1 (A) shows the constituent material (except electroconductive needle-like particle | grains) of the surface layer 11. As shown in FIG.

  Here, in the present invention, the “fine asperity structure” is, for example, composed of a plurality of fine convex portions, and the concave portions (openings) of the formed surface are in the in-layer direction perpendicular to the layer thickness direction. It refers to a structure arranged in series. In such a structure, the average diameter of the opening can not be defined.

  Further, in the present invention, the “microporous structure” is, for example, a layer comprising a porous body having a plurality of micropores, and the recess (opening) on the surface formed is perpendicular to the layer thickness direction It refers to a structure disposed discontinuously in the inward direction. In such a structure, the average diameter of the opening can be defined. Further, in such a construction, the micropores formed inside are preferably continuous, but may be discontinuous.

  As described above, the surface layer formed by at least one of the fine uneven structure and the fine porous structure is provided, and the surface layer is excellent by having a conductive layer containing conductive needle-like particles. It becomes the antistatic structure which has the antistatic property.

  When the surface layer is impregnated with a fluorine-containing liquid such as fluorine oil described later in detail to form an antistatic antifouling structure, the fluorine-containing liquid is difficult to be charged by the action of the conductive layer that diffuses the charge. Therefore, it is possible to suppress adhesion of solid dirt such as dust and sand. Of course, it is also possible to easily slide off liquid stains by impregnating with a fluorine-containing liquid.

  Here, each configuration will be described in more detail.

  Examples of the component 11A include silicon oxide, aluminum oxide, magnesium oxide, titanium oxide, cerium oxide, cerium oxide, niobium oxide, zirconium oxide, indium oxide, tin oxide, zinc oxide, simple oxide such as hafnium oxide, and barium titanate. For example, complex oxides such as glass and glass can be applied. However, the present invention is not limited to these, and nonoxides such as silicon nitride and fluorine magnesium can also be applied. Among them, silicon oxide, aluminum oxide, titanium oxide, indium oxide, tin oxide, zirconium oxide and the like are preferable from the viewpoint of excellent light transmittance.

  Further, as the conductive needle-like particles 12A, for example, tin-doped indium oxide (ITO), fluorine-doped tin oxide (FTO), antimony-doped tin oxide (ATO), aluminum-doped zinc oxide (AZO), gallium-doped zinc oxide ( Inorganics such as GZO) can be applied. However, it is not limited to these, For example, organic substances, such as conductive resin fiber which consists of polyacetylene, polypyrrole, polythiophene, polyaniline etc., can also be applied. In the case of applying an inorganic substance, it is possible to provide an antistatic structure having excellent durability as compared with the case of applying an organic substance.

  Furthermore, as the substrate 13, for example, complex oxides such as simple oxides such as silicon oxide, aluminum oxide, magnesium oxide, titanium oxide, cerium oxide, cerium oxide, niobium oxide, zirconium oxide, indium oxide, hafnium oxide, barium titanate and the like A thing, furthermore, glass etc. can be applied. However, the present invention is not limited to these, and for example, non-oxides such as silicon nitride and fluorine magnesium can also be applied. Moreover, it is not limited to these inorganic substances, For example, non-crosslinked acrylic, crosslinked acrylic, crosslinked acrylic-urethane copolymer, crosslinked acrylic-elastomer copolymer, silicone elastomer, polyethylene, polypropylene, crosslinked polyvinyl alcohol, poly Vinylidene chloride, polyethylene terephthalate, polyvinyl chloride, polycarbonate, modified polyphenylene ether, polyphenylene sulfide, polyether ether ketone, liquid crystalline polymer, fluorine resin, polyarete, polysulfone, polyether sulfone, polyamide imide, polyether imide, thermoplastic polyimide, Organic substances such as polystyrene and urethane elastomers can also be applied. The base material may be formed separately or integrally with the surface layer, but may be omitted.

  Further, in the present embodiment, as described above, it is preferable that the conductive layer be disposed in the lowermost layer of the surface layer. With such a configuration, it is possible to obtain an antistatic structure having more excellent antistatic properties. In other words, it is possible to obtain an antistatic structure having excellent antistatic properties while suppressing the addition amount of the conductive needle-like particles. In addition, since the conductive needle-like particles contained in the conductive layer are oriented in a predetermined direction, it is possible to provide an antistatic structure having light scattering prevention properties and having excellent transparency. Furthermore, when the conductive layer is disposed at the lowermost layer of the surface layer, for example, fluorine such as fluorine oil described later will be described in detail as compared to the case where the conductive layer is disposed at the uppermost layer of the surface layer. There is an advantage that it is easy to secure the affinity to the contained liquid, and it is possible to secure excellent water droplet slipperiness. However, it is needless to say that the present invention is not limited to such a configuration, and any device that can exert the effects of the present invention is included in the scope of the present invention.

Furthermore, in the present embodiment, the conductive layer has the following formula (1):
d [nm] ≦ 380 [nm] / n ₁ (1)
It is preferable that the relationship represented by (In the formula (1), d represents the thickness of the conductive layer and n ₁ represents the refractive index of the conductive needle-like particles).

  Here, in the present invention, as “the thickness (d) of the conductive layer”, for example, in a cross section perpendicular to the top surface of the antistatic structure, the conductive needle particles are observed by a transmission electron microscope (TEM) The thickness of the range in which the conductive needle particles to be measured are included can be applied.

Further, in the present invention, as the “refractive index (n ₁ ) of conductive needle-like particles”, for example, the refractive index of a conductive film of the same composition measured by an Abbe refractometer can be applied.

  Furthermore, in the present embodiment, it is preferable that the conductive needle particles be made of a transparent inorganic compound such as antimony-doped tin oxide (ATO). As a specific example, a needle-like transparent conductive material (FS-10P) manufactured by Ishihara Sangyo Co., Ltd. can be mentioned. With such a configuration, it is possible to obtain an antistatic structure having excellent transparency as well as having excellent durability as compared with the case of applying an organic substance.

With the above configuration, the thickness of the conductive layer can be preferably 100 nm or less, more preferably 10 to 90 nm, and the conductive needle-like particles are oriented in the direction perpendicular to the layer thickness direction. The light transmitting property and the light scattering preventing property can be easily compatible, and an antistatic structure having more excellent transparency can be obtained. On the other hand, when the thickness of the conductive layer is thick and exceeds 380 / n ₁ [nm], the antistatic structure having excellent transparency because the addition amount of the conductive needle-like particles is limited, etc. There is something that can not be done. However, it is needless to say that it is not limited at all to such a range, and it may be out of this range as long as the effect of the present invention can be exhibited.

Furthermore, in the present embodiment, the conductive needle-like particles have the following formulas (2) and (3)
10 ≦ B [nm] / A [nm] ≦ 100 (2)
A [nm] <380 [nm] / n ₁ (3)
(In the formulas (2) and (3), A represents the minor diameter of the conductive needle particles, B represents the major diameter of the conductive needle particles, and n ₁ represents the refractive index of the conductive needle particles.) It is preferable to satisfy the relationship.

  Here, in the present invention, “the minor diameter (A) of the conductive needle-like particles” means, for example, a scanning electron microscope (SEM) or a transmission electron microscope (electroconductive needle-like particles from the top surface of the antistatic structure). A plurality of conductive needle-like particles observed and observed by TEM) between two parallel lines, and means the average value of the distance when the distance between the two parallel lines is minimized. In the present invention, "the major diameter (B) of the conductive needle-like particles" means an average value of the distance when two parallel lines perpendicular to two parallel lines defining the minor axis. Say

  With the above configuration, the conductive needle particles do not cause Mie scattering, so it is possible to provide an antistatic structure having excellent transparency. In addition, since excellent transparency can be secured, it is possible to increase the addition amount of the conductive needle-like particles, and it is also possible to provide an antistatic structure having more excellent antistatic properties. However, it is needless to say that it is not limited at all to such a range, and it may be out of this range as long as the effect of the present invention can be exhibited.

  In the present embodiment, the surface layer preferably contains 1 to 10% by mass of the conductive needle-like particles, and more preferably 2 to 9.5% by mass. With such a configuration, the gap between the conductive needle-like particles is large, it is easy to ensure light transmittance, and it is possible to make the antistatic structure having excellent transparency. In addition, when the conductive layer is disposed in the lowermost layer of the surface layer and the surface layer contains 1 to 10% by mass of conductive needle-like particles, the gap between the conductive needle-like particles is large, Since the conductive needle-like particles contained in the conductive layer are oriented in a certain direction, it is possible to easily achieve both light transmission and light scattering prevention, and to obtain an antistatic structure having more excellent transparency. On the other hand, when the content of the conductive needle-like particles is small and less than 1% by mass, the antistatic structure having excellent transparency because the conductive needle-like particles to be applied is limited, etc. There is nothing to do. On the other hand, when the content of the conductive needle-like particles is large and is more than 10% by mass, the antistatic structure having excellent transparency because the conductive needle-like particles to be applied is limited, etc. There is nothing to do. However, it is needless to say that it is not limited at all to such a range, and it may be out of this range as long as the effect of the present invention can be exhibited.

Furthermore, in the present embodiment, the surface layer is formed of a microporous structure, and the microporous structure has the following formula (4):
10 [nm] D D [nm] 400 400 [nm] / n ₂ (4)
(In the formula (4), D represents the average diameter of the surface opening of the microporous structure, and n ₂ represents the refractive index of the component of the surface layer (excluding conductive needle particles)). It is preferable to satisfy the relationship shown.

  Here, in the present invention, as “the average diameter (D) of the surface openings of the microporous structure”, for example, the surface openings are observed from the top surface of the antistatic structure by a scanning electron microscope (SEM), By image analysis, each opening can be converted into a circle of the same area, and the average of the diameters of the circles can be applied.

In the present invention, the “refractive index (n ₂ ) of the constituent material of the surface layer” is, for example, a film made of a constituent material (excluding conductive needle-like particles) of the same composition measured by an Abbe refractometer. The refractive index can be applied. In addition, when the surface treatment which forms a monomolecular layer is performed with respect to the component of a surface layer, the component (The electroconductive needle-like particle is remove | excluded.) Of the same composition measured by an Abbe refractometer, for example. The refractive index of the film obtained by surface treatment of the film of

If it is set as the above-mentioned, it is possible to set it as the antistatic structure which has the outstanding transparency while having the outstanding retainability of a fluorine-containing liquid. That is, the fine porous structure is excellent in the retention of the fluorine-containing liquid as compared with the fine concavo-convex structure. When the average diameter of the opening is 10 nm or more, it is possible to obtain an antistatic structure having particularly excellent retention of the fluorine-containing liquid. In addition, when the average diameter of the openings is 400 / n ₂ [nm] or less, it is possible to make an antistatic structure having a particularly low haze value and excellent transparency. The haze value is required to be less than 1% in automobile parts, preferably 0.1% to 0.8%. However, it is needless to say that it is not limited at all to such a range, and it may be out of this range as long as the effect of the present invention can be exhibited.

Further, in the present embodiment, the surface layer is formed of a microporous structure, and the conductive layer in the surface layer is represented by the following formula (5):
40 [nm] ≦ d [nm] ≦ 380 [nm] / n ₁ (5)
It is preferable that the relationship represented by (In the formula (5), d represents the thickness of the conductive layer and n ₁ represents the refractive index of the conductive acicular particles).

With the above configuration, the conductive needle particles in the conductive layer of the surface layer formed by the microporous structure are oriented in the direction perpendicular to the layer thickness direction, and the light transmittance and the light scattering prevention property It is possible to make it an antistatic structure having both of the above and the above, and more excellent transparency. On the other hand, when the thickness of the conductive layer is thick and less than 40 nm or more than 380 / n ₁ nm, the transparency is excellent because the amount of the conductive needle particles is limited. And may not be an antistatic structure. However, it is needless to say that it is not limited at all to such a range, and it may be out of this range as long as the effect of the present invention can be exhibited.

  Furthermore, in the present embodiment, the surface layer is preferably formed of a microporous structure, and it is preferable that the conductive needle-like particles are contained in an amount of 5 to 10% by mass. With such a configuration, the gap between the conductive needle-like particles of the conductive layer in the surface layer formed by the fine porous structure is large, and it is easy to ensure light transmittance, and an antistatic structure having excellent transparency. It is possible to make it a body. In addition, when the conductive layer is disposed on the lowermost layer of the surface layer formed of the microporous structure, and the surface layer contains 5 to 10% by mass of conductive needle-like particles, conductivity is obtained. Since the gaps between the needle-like particles are large and the conductive needle-like particles contained in the conductive layer are oriented in a certain direction, it is easy to achieve both light transparency and light scattering prevention, and an antistatic structure having more excellent transparency. It is possible to make it a body. On the other hand, when the content of the conductive needle-like particles is small and less than 5% by mass, the antistatic structure having excellent transparency because the conductive needle-like particles to be applied is limited, etc. There is nothing to do. On the other hand, when the content of the conductive needle-like particles is large and is more than 10% by mass, the antistatic structure having excellent transparency because the conductive needle-like particles to be applied is limited, etc. There is nothing to do. However, it is needless to say that it is not limited at all to such a range, and it may be out of this range as long as the effect of the present invention can be exhibited.

Further, in the present embodiment, the surface layer is formed of the microporous structure, and the microporous structure is formed of the following formula (6)
10 [nm] ≦ D [nm] ≦ 200 [nm] (6)
(In Formula (6), D represents the average diameter of the surface opening of the microporous structure.) It is preferable to satisfy the relationship shown in Formula (6), and the upper limit of Formula (6) is 150 [nm] or less Is more preferable, 100 nm or less is more preferable, and 50 nm or less is particularly preferable.

  If it is set as the above-mentioned, it is possible to set it as the antistatic structure which has the outstanding transparency while having the outstanding retainability of a fluorine-containing liquid. That is, the fine porous structure is excellent in the retention of the fluorine-containing liquid as compared with the fine concavo-convex structure. When the average diameter of the opening is 10 nm or more, it is possible to obtain an antistatic structure having particularly excellent retention of the fluorine-containing liquid. In addition, when the average diameter of the opening is 200 nm or less, more preferably 150 nm or less, still more preferably 100 nm or less, and particularly preferably 50 nm, the haze value is particularly small. It is possible to provide an antistatic structure having excellent transparency. The haze value is required to be less than 1% in automobile parts, preferably 0.1% to 0.8%. However, it is needless to say that it is not limited at all to such a range, and it may be out of this range as long as the effect of the present invention can be exhibited.

Second Embodiment
Next, a method of manufacturing the antistatic structure according to the second embodiment of the present invention will be described in detail with reference to the drawings. Although the antistatic structure of the present invention does not have to be obtained by the method of manufacturing the antistatic structure of the present invention, the antistatic structure is manufactured by the method of manufacturing the antistatic structure of the present invention. Can be easily produced. The same reference numerals are given to the same components as those described in the above embodiment, and the description thereof will be omitted. FIG. 2 is a flow chart showing a method of manufacturing an antistatic structure according to a second embodiment of the present invention.

  As shown in FIG. 2, the method for producing the antistatic structure of the present embodiment is a method for producing the antistatic structure according to the above-mentioned embodiment of the present invention, which comprises the following steps (1) to (4) )including.

First, as shown in FIG. 2A, in the step (1), the coating layer 21 is formed on the substrate 13 by the coating liquid 20. The coating liquid 20 contains the raw material of the component of the surface layer (but excluding the surface treatment agent) and the dispersion for dispersing the raw material, and the specific gravity (G ₁ ) of the conductive needle-like particles 12A Among the raw materials, those having a specific gravity difference (G ₁ -G ₂ ) with respect to the specific gravity (G ₂ ) of the solution other than the conductive needle-like particles 12A and the dispersion liquid are 2 or more, preferably 3 to 10 It is At this time, the specific gravity of the conductive needle-like particles is about 4 to 8, and the specific gravity of the solution is about 0.9 to 1.2. The above solution also includes a colloidal solution.

  Next, as shown in FIG. 2 (B), in the step (4) performed after the step 1 (1) and before the step (2), the coat layer 21 is allowed to stand to form the coat layer. The conductive needle-like particles 12A in 21 are sedimented. At this time, for example, by allowing the conductive needle particles to reliably settle by standing at room temperature for 1 to 10 minutes, preferably 3 to 7 minutes, the conductive layer can be disposed in the lowermost layer of the surface layer. it can.

  Furthermore, as shown in FIG. 2C, in the step (2) performed after the step (1), the coating layer 21 is heated to remove the dispersion medium in the coating layer 21. Thereby, the coating layer 21 containing the raw material (except the surface treatment agent and the conductive needle-like particles) 21A of the constituent material and the conductive needle-like particles 12A is formed. At this time, the dispersion medium in the coating layer can be removed, for example, by heat treatment at 100 to 200 ° C. for 30 minutes to 2 hours.

  Thereafter, as shown in FIG. 2D, in the step (3) to be carried out after the step (2), the coat layer 21 is heated to polymerize the raw materials in the coat layer 21 to form a microrelief structure. A surface layer 11 is formed which is formed of at least one of a body and a microporous structure and has a conductive layer 12 containing conductive needle-like particles 12A. In addition, the code | symbol 11A in FIG. 2 (D) shows the constituent material (except electroconductive needle-like particle | grains) of the surface layer 11. As shown in FIG. Thereby, the antistatic structure 10 is obtained. At this time, for example, a predetermined surface layer can be formed by baking by heat treatment at 400 to 600 ° C. for 30 minutes to 2 hours.

  As described above, it is easily produced by producing the antistatic structure by the production method to which the sol-gel method including the step (1) to the step (3), preferably the step (1) to the step (4) is applied. be able to. That is, by conducting the steps (1) to (3), most of the conductive needle-like particles can be settled and oriented parallel to the surface of the substrate by the time of temporary curing for removing the dispersion medium. It becomes possible to make it a structure which is easy to make light transmittance and light-scattering prevention compatible. In addition, by passing through the step (4), the conductive needle-like particles can be more reliably precipitated by the time of temporary curing for removing the dispersion medium, and can be oriented parallel to the surface of the base material, It becomes possible to make it the composition which is easy to make compatibility and light scattering prevention nature compatible.

  Here, the raw material etc. of the constituent material of surface layers other than a surface treatment agent and electroconductive needle-like particle | grains are demonstrated in detail.

  As a raw material of the component of a surface layer, what contains the component of the component of a surface layer mentioned above, disperse | distributes to the dispersion liquid mentioned later, and can prepare sol liquid can be mentioned. When the constituent material is silicon oxide, for example, silicates such as methyl silicate, ethyl silicate, propyl silicate and butyl silicate can be applied. However, it is not limited to these.

  Moreover, as a dispersion liquid, a water and a mixture can be mentioned, for example, triethylene glycol, methanol, ethanol, propanol, isopropanol, butanol, n-hexane and the like. However, it is not limited to these. In addition, hydrochloric acid or sulfuric acid can be added as a reaction catalyst.

  In addition, it is preferable to adjust the relationship between the surface free energy of the surface of the fine projections of the surface layer and the surface of the micropores and the surface free energy of a fluorine-containing liquid such as fluorine oil described later in detail. As this adjustment method, there are a dry film forming method by physical vapor deposition (PVD) or chemical vapor deposition (CVD), and a wet method in which a reactive reagent such as a fluorine-based silane coupling agent is applied to perform surface treatment. is there. Among them, a wet method of applying a surface treatment agent such as a fluorine-based silane coupling agent diluted in a fluorine-based solvent can be mentioned as a suitable method which can be adjusted more simply and uniformly.

  In the above case, as the fluorine-based main chain of the silane coupling agent, one composed of perfluoropolyether, perfluoroalkyl or the like is preferable, and the presence of oxygen enhances the interaction between the fluorine-based main chains. More preferred is a fluorine-based main chain composed of fluoropolyether. By applying these, the retention of the fluorine-containing liquid in the surface layer can be improved.

As the surface treatment material other than fluorine-based silane coupling agent, for _{example, CH 3 - (Si (CH} 3) 2-O) n-Si (CH 3) 2 OCH 3 (n>13; contact angle 95 105 °), CH _3- (Si (CH ₃ ) ₂ -O) _n -SiCH ₃ (OCH ₃ ) ₂ (n>13; contact angle 95 to 105 °), CH _3- (Si (CH ₃ ) _2- O) n-Si (OCH ₃ ) ₃ (n>13; contact angle 95 to 105 °), CH _3- (Si (CH ₃ ) ₂ -O) _n -Si (OC ₂ H ₅ ) ₃ (n> 13) Contact angle 95 to 105 °), CH _3- (Si (CH ₃ ) ₂ -O) _n -Si (CH ₂ ) ₂ (CH ₂ ) ₃ OCH ₂ CH (OH) CH ₂ NH (CH ₂ ) ₃ Si (OCH ₃ ) ₃ (n>13; contact angle 95 to 105 °), (CH _3- (Si) (CH ₃ ) ₂ -O) n -Si (CH ₃ ) ₂ (CH ₂ ) ₃ OCH ₂ CH (OH) CH ₂ ) ₂ N (CH ₂ ) ₃ Si (OCH ₃ ) ₃ (n>13; contact angle _{95~105 °), CH 3 - (} Si (CH 3) 2 -O) n -Si (OH) 3 (n>13; contact angle _{95~105 °), CH 3 - (} Si (CH 3) 2 - O) _n Si (CH ₃ ) ₂ Cl (n>13; contact angle 95 to 105 °), CH _3- (Si (CH ₃ ) ₂ -O) n -Si (CH ₃ ) ₂ (CH ₂ ) ₂ SiCH ₃ Cl ₂ (n>13; contact angle 95 to 105 °), CH _3- (Si (CH ₃ ) ₂ -O) _n -SiCl ₃ (n>13; contact angle 95 to 105 °), CH _3- (Si _{(CH 3) 2 -O) n} -Si (OCOCH 3) 3 (n>13; contact angle 95 to 105 ° _{, CH 3 - (Si (CH} 3) 2 -O) n -Si (NCO) 3 (n>13; contact angle _{95~105 °), CH 3 - (} Si (CH 3) 2 -O) n -Si (CH ₃ ) ₂ (CH ₂ ) ₃ O (CH ₂ ) ₃ OCONHSi (NCO) ₃ (n>13; contact angle 95 to 105 °), Rf- (CH ₂ ) _2- (Si (CH ₃ ) _2- O) _n -Si (CH ₃ ) ₂ (CH ₂ ) ₃ OCH ₂ CH (OH) CH ₂ NHSi (OCH ₃ ) ₃ (n>13; contact angle 95 to 115 °), (Rf- (CH ₂ ) _{2 - (Si (CH 3) 2} -O) n-Si (CH 3) 2 (CH 2) 3 OCH 2 CH (OH) CH 2) 2 n (CH 2) 3 Si (OCH 3) 3 (n> 13 Silicone compounds having a contact angle of 95 to 115 °). Moreover, it is possible to use what changed the substituent of the said silane compound to isocyanate.

Third Embodiment
Next, an antistatic antifouling structure according to a third embodiment of the present invention will be described in detail with reference to the drawings. In addition, about the thing equivalent to what was demonstrated in said embodiment, the code | symbol same as them is attached | subjected and description is abbreviate | omitted. FIG. 3 is a schematic cross-sectional view showing an antistatic antifouling structure according to a third embodiment of the present invention.

  As shown in FIG. 3, the antistatic antifouling structure 1 of the present embodiment is provided with a surface layer 11 formed of at least one of a fine uneven structure and a fine porous structure on a base material 13, and a surface The layer 11 is held by the surface layer 11 by being impregnated into the antistatic layer 10 having the conductive layer 12 containing the conductive needle-like particles 12A dispersed therein and the surface layer 11, and the surface layer And 11. a fluorine-containing liquid 30 covering the surface of 11.

  As described above, an antistatic structure comprising a surface layer formed by at least one of a fine relief structure and a fine porous structure, the surface layer comprising a conductive layer containing conductive needle-like particles, By including the fluorine-containing liquid impregnated in the layer, the fluorine-containing liquid is less likely to be charged by the action of the conductive layer that diffuses the electric charge, thereby suppressing the adhesion of solid dirt such as dust and sand. It becomes an anti-static antifouling structure that can be Of course, it is also possible to slide down liquid stains easily.

  Further, in the present embodiment, it is preferable to apply the preferred embodiment in the above-described first embodiment, whereby the transparency, the durability, and the water droplet slipping property can be made excellent as described above. . In addition, the retention of the fluorine-containing liquid can also be improved.

  Here, the fluorine-containing liquid will be described in detail.

  The fluorine-containing liquid is not particularly limited as long as it has a fluorine-based main chain or side chain, and specific examples include fluoroether-based and fluoroalkyl-based fluorine oils. Since Krytox (perfluoropolyether type) manufactured by Dupont Co., Ltd. has a low vapor pressure (0.01 Pa or less) and a low volatility, it is easy to maintain.

  Other examples include Fluorinert (perfluoroalkyl type) and Nobec (perfluoropolyether type) manufactured by 3M, and Demunum (perfluoroalkyl type) manufactured by Daikin Industries, Ltd. It is preferable to apply to various uses. In order to adjust the viscosity and the vapor pressure of these fluorine oils, a functional group having a halogen element other than fluorine or a halogen other than fluorine may be added to the side chain.

  Moreover, in the present embodiment, it is preferable that the evaporation loss after holding the fluorine-containing liquid at 120 ° C. for 24 hours is less than 35% by mass. With such a configuration, it is possible to obtain an antistatic antifouling structure having excellent durability. For example, even when applied to automotive applications, the fluorine-containing liquid is naturally evaporated and hardly deteriorates in performance, and antifouling property can be exhibited for a long time near normal temperature (5 to 35 ° C.). However, it is needless to say that it is not limited at all to such a range, and it may be out of this range as long as the effect of the present invention can be exhibited.

Further, in the present embodiment, a viscosity at 0 ℃ fluorine-containing liquid is preferably not more than 160 mm ² / s, is more suitably a 3~100mm ² / s, 8~80mm ² It is further preferred that / s. With such a configuration, it is possible to obtain an antistatic antifouling structure having excellent water droplet slippage. This makes it possible to maintain the dirt slipping property. However, it is needless to say that it is not limited at all to such a range, and it may be out of this range as long as the effect of the present invention can be exhibited.

Fourth Embodiment
Next, an automobile component according to a fourth embodiment of the present invention will be described in detail.
The automobile part of this embodiment has the antistatic structure or the antistatic antifouling structure of the present invention.

  Here, examples of automobile parts include camera lenses, mirrors, glass windows, painted surfaces such as bodies, covers of various lights, door knobs, meter panels, window panels, radiator fins, evaporators and the like. However, it is not limited to these.

  By adopting the above-described configuration, the antistatic property of the automobile part can be made excellent, so that the number of times of car washing and cleaning of the automobile can be reduced. In addition, by applying the preferred embodiment in the first or second embodiment described above, it is possible to make the transparency, the durability, and the water dropout property excellent as described above. In addition, the retention of the fluorine-containing liquid can also be improved. Thus, for example, when applied to an on-vehicle camera, a mirror, a window or the like, a clear view can be secured even in rainy weather or bad roads.

  Hereinafter, the present invention will be described in more detail by way of examples.

Example 1
First, water 0.93 g, triethylene glycol 1.5g, and isopropanol 0.78g uniformly mixed, with the addition of 32N sulfuric acid 0.3g To the resulting mixture, a solution _{A 1} was prepared. Further, ethyl silicate (Colcoat Co., Ltd., Ethyl Silicate 40) 8.04 g and, by uniformly mixing the isopropanol 0.78 g, the solution _{B 1} was prepared.

Then, mixed solution A ₁ and solution B ₁ obtained, was stirred for 15 minutes with a stirrer to prepare a sol solution.

Furthermore, the obtained sol solution was diluted 5-fold with isopropanol to prepare a solution C ₁ (specific gravity G ₂ : 0.83).

Furthermore, conductive needle-like particles (composition: antimony-doped tin oxide such that the content of the conductive needle-like particles in the surface layer after the polymerization reaction of ethyl silicate in the obtained solution C ₁ is 9.5% by mass A major diameter B / minor diameter A: 200 nm / 10 nm, refractive index n ₁ : 2.1, specific gravity G ₁ : 6.6) were added to prepare a coating liquid used in this example.

  Furthermore, a coating layer was formed on the glass substrate by spin coating (rotational speed: 1500 rpm, rotational time: 20 seconds, humidity 60%) using the obtained coating liquid.

  Furthermore, the formed coating layer was allowed to stand at a humidity of 60% at room temperature (25 ° C.) for 5 minutes.

  Further, the standing coating layer was heated by an oven (heating temperature: 150 ° C., heating time: 1 hour) to remove the dispersion medium, and the coating layer was temporarily cured.

  Thereafter, the temporarily cured coat layer was baked at 500 ° C. for 1 hour to obtain the antistatic structure of this example.

(Example 2)
Conductive needle-like particles (Composition: antimony-doped tin oxide, major axis B / minor axis A: 500 nm / 20 nm, refractive index n ₁ : 2.1, specific gravity G ₁ : 6) were added to the solution C ₁ obtained in Example 1. 6) was added so that the content of the conductive needle-like particles in the surface layer after the polymerization reaction of ethyl silicate was 8% by mass, to prepare a coating liquid used in this example. Thereafter, the same procedure as in Example 1 was repeated except that the obtained coating liquid was used, to obtain an antistatic structure of this example.

(Example 3)
Conductive needle-like particles (Composition: antimony-doped tin oxide, major axis B / minor axis A: 200 nm / 20 nm, refractive index n ₁ : 2.1, specific gravity G ₁ : 6) were added to the solution C ₁ obtained in Example 1. 6) was added so that the content of conductive needle-like particles in the surface layer after the polymerization reaction of ethyl silicate was 5% by mass, to prepare a coating liquid used in this example. Thereafter, the same procedure as in Example 1 was repeated except that the obtained coating liquid was used, to obtain an antistatic structure of this example.

(Example 4)
Conductive needle-like particles (Composition: antimony-doped tin oxide, long diameter B / short diameter A: 200 nm / 10 nm, refractive index n ₁ : 2.1, specific gravity G ₁ : 6) in the solution C ₁ obtained in Example 1 6) was added so that the content of the conductive needle-like particles in the surface layer after the polymerization reaction of ethyl silicate was 9% by mass, to prepare a coating liquid used in this example. Thereafter, the same procedure as in Example 1 was repeated except that the obtained coating liquid was used, to obtain an antistatic structure of this example.

(Example 5)
First, water 0.8 g, and triethylene glycol 1.5g, and evenly mixing the isopropanol 0.78 g, was added 32N sulfuric acid 0.3 g, the solution _{A 5} were prepared. Further, tetraethoxysilane 8.0 g, and isopropanol 0.78g were uniformly mixed, the solution _{B 5} was prepared.

Then, mixed solution A ₅ and solution B ₅ obtained was stirred for 15 minutes with a stirrer to prepare a sol solution.

Furthermore, the obtained sol solution was diluted 5-fold with isopropanol to prepare a solution C ₅ (specific gravity G ₂ : 0.81).

Furthermore, the resulting solution _{C 5} to conductive acicular particles (composition: antimony-doped tin oxide, major axis B / minor A: 600 nm / 10 nm, the refractive index _n 1: 2.1, a specific gravity _G 1: 6.6) Were added such that the content of conductive needle-like particles in the surface layer after the polymerization reaction of tetraethoxysilane was 5% by mass, to prepare a coating liquid used in this example.

  Thereafter, the same procedure as in Example 1 was repeated except that the obtained coating liquid was used, to obtain an antistatic structure of this example.

(Example 6)
Example 5 In the resulting solution _{C 5} to conductive acicular particles (composition: antimony-doped tin oxide, major axis B / minor A: 200 nm / 10 nm, the refractive index _n 1: 2.1, a specific gravity _G 1: 6. 6) was added so that the content of the conductive needle-like particles in the surface layer after the polymerization reaction of tetraethoxysilane was 6% by mass, to prepare a coating liquid used in this example. Thereafter, the same procedure as in Example 1 was repeated except that the obtained coating liquid was used, to obtain an antistatic structure of this example.

(Example 7)
First, water 0.4 g, and triethylene glycol 1.5g, and evenly mixing the isopropanol 0.78 g, was added 32N sulfuric acid 0.3 g, the solution _{A 7} was prepared. Further, tetraethoxysilane 8.0 g, and isopropanol 0.78g were uniformly mixed, the solution _{B 7} was prepared.

Then, mixed solution A ₇ and solution B ₇ obtained was stirred for 15 minutes with a stirrer to prepare a sol solution.

Furthermore, the obtained sol solution was diluted 5-fold with isopropanol to prepare a solution C ₇ (specific gravity G ₂ : 0.81).

Furthermore, the resulting solution _{C 7} to conductive acicular particles (composition: antimony-doped tin oxide, major axis B / minor A: 2000 nm / 20 nm, the refractive index _n 1: 2.1, a specific gravity _G 1: 6.6) Were added such that the content of conductive needle-like particles in the surface layer after the polymerization reaction of tetraethoxysilane was 2% by mass, to prepare a coating liquid used in this example.

  Thereafter, the same procedure as in Example 1 was repeated except that the obtained coating liquid was used, to obtain an antistatic structure of this example.

(Example 8)
Conductive acicular particles in a solution _{C 7} obtained in Example 7 (composition: antimony-doped tin oxide, major axis B / minor A: 2000 nm / 20 nm, the refractive index _n 1: 2.1, a specific gravity _G 1: 6. 6) was added so that the content of conductive needle-like particles in the surface layer after the polymerization reaction of tetraethoxysilane was 3% by mass, to prepare a coating liquid used in this example. Thereafter, the same procedure as in Example 1 was repeated except that the obtained coating liquid was used, to obtain an antistatic structure of this example.

(Example 9)
Conductive acicular particles in a solution _{C 7} obtained in Example 7 (composition: antimony-doped tin oxide, major axis B / minor A: 200 nm / 20 nm, the refractive index _n 1: 2.1, a specific gravity _G 1: 6. 6) was added so that the content of conductive needle-like particles in the surface layer after the polymerization reaction of tetraethoxysilane was 3% by mass, to prepare a coating liquid used in this example. Thereafter, the same procedure as in Example 1 was repeated except that the obtained coating liquid was used, to obtain an antistatic structure of this example.

(Example 10)
First, tetraethoxysilane 3.75 g, was mixed with hydrochloric acid (pH 2) 1.15 g, a solution _{A 10} was prepared. Further, a methyltriethoxysilane 9.62 g, was mixed with hydrochloric acid (pH 2) 2.06 g, a solution _{B 10} was prepared.

Next, each of the obtained solution A ₁₀ and solution B ₁₀ was stirred for 1 hour, then mixed, and stirred with a slurryer for 15 minutes to prepare a sol solution.

Furthermore, the obtained sol solution was diluted 10 times with isopropanol to prepare a solution C ₁₀ (specific gravity G ₂ : 0.80).

Furthermore, conductive needle-like particles (Composition: antimony-doped tin oxide, long diameter B / short diameter A: 200 nm / 20 nm, refractive index n ₁ : 2.1, specific gravity G ₁ : 6.6) in the obtained solution C ₁₀ Were added such that the content of conductive needle-like particles in the surface layer after polymerization reaction of each silane was 5% by mass, to prepare a coating liquid used in this example.

  Thereafter, the same procedure as in Example 1 was repeated except that the obtained coating liquid was used, to obtain an antistatic structure of this example.

( Reference Example 11 )
Conductive needle-like particles (Composition: conductive resin fiber (SCIMA manufactured by Toray Industries, Inc. is pulverized into a long diameter B / short diameter A: adjusted to become 200,000 nm / 5000 nm) to the solution C ₇ obtained in Example 7 Such that the content of conductive needle-like particles in the surface layer after polymerization reaction of tetraethoxysilane with refractive index n ₁ : 1.6, specific gravity G ₁ : 1.1) is 90% by mass To prepare a coating solution to be used in this example. Thereafter, the same procedure as in Example 1 was repeated except that the obtained coating liquid was used, to obtain an antistatic structure of this example.

(Comparative example 1)
The solution C ₁ obtained in Example 1 was used as the coating liquid used in this example. The same operation as in Example 1 was repeated except that the obtained coating liquid was used, to obtain an antistatic structure of this example. Some of the specifications of each example are shown in Table 1. The “surface roughness” in Table 1 was measured by an atomic force microscope. In addition, “Evaporation loss” was calculated by spreading in a petri dish, heating at 120 ° C. for 24 hours, and measuring.

<Surface treatment>
In addition, each surface layer was immersed in the surface treatment agent shown in Table 1 for 24 hours and dried at 150 ° C. for 1 hour with respect to the antistatic structure of each example. Further, this operation was repeated three times to obtain the surface-treated antistatic structure of each example.

<Impregnation of fluorine-containing liquid>
The surface-treated antistatic structure of each of the above examples was coated with the fluorine-containing liquid shown in Table 1 on each surface layer, and the excess oil on the surface was wiped off to obtain the antistatic antifouling structure of each example. Obtained.

[Performance evaluation]
The following performance was evaluated using the antistatic antifouling structure of each said Example.

(Antistatic property)
The surface resistivity was measured using the resistivity meter (Hyrester UX MCP-HT800, manufactured by Mitsubishi Chemical Analytech Co., Ltd.) for the antistatic antifouling structure of each of the above examples to evaluate the antistatic property. The obtained results are shown in Table 2. In Table 2, “「 ”in the antistatic property indicates that the surface resistivity is 10 ¹⁰ Ω / sq or less, and“ o ”indicates that the surface resistivity is more than 10 ¹⁰ Ω and 10 ¹² Ω / sq or less And “×” indicates that the surface resistivity exceeds 10 ¹² Ω / □.

(transparency)
The haze of the antistatic antifouling structure of each of the above examples was measured using a haze meter (manufactured by Murakami Color Research Laboratory) to evaluate transparency. The obtained results are shown in Table 2. In Table 2, "◎" in transparency indicates that the haze H is 0.5% or less, "「 "indicates that the haze H is more than 0.5% and 1% or less," Δ " Indicates that the haze H is greater than 1% and not more than 30%, and "x" indicates that the haze H is greater than 30%.

(durability)
With respect to the antistatic antifouling structure of each of the above examples, after sliding back and forth 1000 times with a canvas cloth, the sliding angle was measured by the same operation as the evaluation of the water drop sliding property to evaluate the durability. The obtained results are shown in Table 2. In Table 2, "◎" in durability indicates that the falling angle is 10 ° or less, "「 "indicates that the falling angle is greater than 10 ° and 20 ° or less, and" △ "indicates the falling angle It shows that it is more than 20 degrees and 40 degrees or less, and "x" shows that a falling angle is larger than 40 degrees.

(Water drop slipperiness)
With respect to the antistatic antifouling structure of each of the above examples, 20 μL of water was dropped, and the falling angle was measured to evaluate the water droplet slipping property. The obtained results are shown in Table 2. In Table 2, "◎" in the water drop sliding property indicates that the falling angle is 10 ° or less, "○" indicates that the falling angle is greater than 10 ° and 15 ° or less, and "Δ" indicates the falling angle Indicates that the angle is greater than 15 ° and not more than 30 °, and “x” indicates that the sliding angle is greater than 30 °.

From Tables 1 and 2, the antistatic antifouling structure using the antistatic structure of Examples 1 to 10 belonging to the range of the present invention is the electrification using the antistatic structure of Comparative Example 1 outside the present invention. It can be seen that the antistatic property is superior to that of the antifouling structure.

Further, it is understood from Tables 1 and 2 that the antistatic antifouling structure using the antistatic structure of Examples 1 to 10 belonging to the range of the present invention has excellent water droplet slipperiness.

Furthermore, according to Table 1, Table 2, FIGS. 1 and 3, according to the antistatic antifouling structure using the antistatic structure of Examples 1 to 10 belonging to the scope of the present invention, the conductive layer is the lowermost layer of the surface layer. It is also considered that they have excellent antistatic property, water droplet slippage property, transparency, and durability because they are disposed in the above.

  Further, according to Tables 1 and 2, the antistatic antifouling structure using the antistatic structure of Examples 1 to 10 belonging to the scope of the present invention is excellent because the conductive needle-like particles are made of the transparent inorganic compound. It is also considered to have antistatic properties, water droplet slippage properties, transparency, and durability.

Furthermore, according to Tables 1 and 2, the antistatic antifouling structure using the antistatic structure of Examples 1 to 10 belonging to the scope of the present invention is excellent because it satisfies the relationship of the above-mentioned formula (1). It is also considered to have antistatic properties, water droplet slippage properties, transparency, and durability.

  Further, from Tables 1 and 2, the antistatic antifouling structure using the antistatic structure of Examples 1 to 10 belonging to the scope of the present invention has the relationship of the above-mentioned formulas (2) and (3). It is also considered that in order to be satisfied, it has excellent antistatic property, water droplet slipperiness, transparency, and durability.

  Furthermore, according to Tables 1 and 2, in the antistatic antifouling structure using the antistatic structure of Examples 1 to 10 belonging to the scope of the present invention, the surface layer contains 1 to 10% by mass of conductive needle particles. Because of the inclusion, it is also considered to have excellent antistatic property, water droplet slipperiness, transparency, and durability.

  Further, from Tables 1 and 2, in the antistatic antifouling structure using the antistatic structure of Examples 1 to 10 belonging to the scope of the present invention, the surface layer is formed of the fine porous structure, and is described above. In order to satisfy the relationship of the formula (4), it is also considered to have excellent antistatic property, water droplet slipping property, transparency, and durability.

  Further, from Tables 1 and 2, in the antistatic antifouling structure using the antistatic structure of Examples 1 to 6 belonging to the scope of the present invention, the surface layer is formed of the fine porous structure, and is described above. In order to satisfy the relationship of Formula (4) and Formula (5), it is also considered that it has the outstanding antistatic property, water droplet slipping property, transparency, and durability.

  Furthermore, according to Tables 1 and 2, in the antistatic antifouling structure using the antistatic structure of Examples 1 to 6 belonging to the scope of the present invention, the surface layer is formed of the microporous structure, and it is described above. Since the surface layer contains the conductive needle-like particles in an amount of 5 to 10% by mass, it has excellent antistatic property, water droplet slipping property, transparency, and durability, satisfying the relationships of the formulas (4) and (5). It is also considered to be a thing.

  Further, from Tables 1 and 2, in the antistatic antifouling structure using the antistatic structure of Examples 1 to 6 belonging to the scope of the present invention, the surface layer is formed of the fine porous structure, and is described above. Since the surface layer contains the conductive needle-like particles in an amount of 5 to 10% by mass, it has excellent antistatic property, water droplet slipping property, transparency, and durability, satisfying the relationships of the formulas (4) to (6). It is also considered to be a thing.

Furthermore, according to Tables 1 and 2, the antistatic antifouling structure using the antistatic structure of Examples 1 to 10 belonging to the scope of the present invention is compared with the method for producing the antistatic structure belonging to the scope of the present invention. Specifically, since the surface layer is formed by a sol-gel method using a coating liquid having a specific gravity difference (G ₁ -G ₂ ) of 2 or more, excellent antistatic property, water droplet slipperiness, transparency, and durability An antistatic antifouling structure having properties can be easily produced.

  Although the present invention has been described above by some embodiments and examples, the present invention is not limited to these, and various modifications can be made within the scope of the present invention.

  For example, in the above-mentioned embodiment, although an automobile part was illustrated as what applies an antistatic structure and an antistatic antifouling structure, it is not limited to this, For example, a motorcycle part, a mobile telephone, an electronic It is also possible to apply to mobile devices such as notebooks, signs, clocks and the like.

DESCRIPTION OF SYMBOLS 1 Antistatic antifouling structure 10 Antistatic structure 11 Surface layer 11A Composition material (except electroconductive needle-like particle.)
12 conductive layer 12A conductive needle-like particles 13 base material 20 coating liquid 21 coating layer 21A raw material of component (excluding surface treatment agent and conductive needle-like particles)
30 Fluorine-containing liquid

Claims (11)

Comprising a surface layer more is formed on the microporous fine porous structure,
The surface layer, have a conductive layer containing conductive acicular particles,
The conductive acicular particles are represented by the following formulas (2) and (3)
10 ≦ B [nm] / A [nm] ≦ 100 (2)
A [nm] <380 [nm] / n ₁ (3)
(In the formulas (2) and (3), A represents the minor diameter of the conductive needle particles, B represents the major diameter of the conductive needle particles, and n ₁ represents the refractive index of the conductive needle particles. Satisfy the relationship shown in),
The above microporous structure has the following formula (4)
10 [nm] D D [nm] 400 400 [nm] / n ₂ (4)
(In the formula (4), D is the refractive index of the average diameter of the surface openings of the fine porous structure, n ₂ is constituting material of the surface layer (except the conductive acicular particles.) An antistatic structure characterized by satisfying the relationship shown in.) .   The antistatic structure according to claim 1, wherein the conductive layer is disposed in the lowermost layer of the surface layer. The conductive layer has the following formula (1)
d [nm] ≦ 380 [nm] / n ₁ (1)
(In Formula (1), d is the thickness of the said conductive layer, n ₁ shows the refractive index of the said electroconductive needle-like particle.) The relationship shown to the relationship shown to Claim 1 or 2 is characterized. Antistatic structure.   The antistatic structure according to any one of claims 1 to 3, wherein the conductive needle particles are made of a transparent inorganic compound. The antistatic structure according to any one of claims 1 to 4, wherein the surface layer contains 1 to 10% by mass of the conductive needle-like particles. The conductive layer has the following formula (5)
40 [nm] ≦ d [nm] ≦ 380 [nm] / n ₁ (5)
(In the formula (5), d is the thickness of the conductive layer, n ₁ is. Showing the refractive index of the conductive acicular particles) either of claims 1 to 5, characterized by satisfying the relationship shown in Antistatic structure according to one item . The antistatic structure according to any one of claims 1 to 6, wherein the surface layer contains 5 to 10% by mass of the conductive needle-like particles. The above microporous structure has the following formula (6)
10 [nm] ≦ D [nm] ≦ 200 [nm] (6)
( Wherein , in the formula (6), D represents the average diameter of the surface opening of the microporous structure). The relationship described in any one of claims 1 to 7 is satisfied. Anti-static structure. The antistatic structure according to any one of claims 1 to 8 .
An antifouling structure comprising the fluorine-containing liquid impregnated in the surface layer. A method for producing an antistatic structure comprising a surface layer formed by at least one of a fine relief structure and a fine porous structure, the surface layer comprising a conductive layer containing conductive needle-like particles, , The following steps (1) to (3)
(1): A raw material of a component of the surface layer (excluding the surface treatment agent) and a dispersion for dispersing the raw material, and the specific gravity (G ₁ ) of the conductive needle-like particles and And a coating liquid having a specific gravity difference (G _1- G ₂ ) between the raw materials other than the conductive needle-like particles and the specific gravity (G ₂ ) of the solution containing the dispersion liquid is 2 or more. Forming a coat layer thereon;
(2): a step of heating the coating layer to be carried out after the step (1) to remove the dispersion medium in the coating layer,
(3): the step of heating the coating layer to be carried out after the step (2) to react the raw materials in the coating layer to form the surface layer; Method of manufacturing the prevention structure. (4): a step which is carried out after the step (1) and before the step (2), wherein the coating layer is allowed to stand to precipitate the conductive needle-like particles in the coating layer The method for producing an antistatic structure according to claim 10 , comprising:

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